How to distribute Python COM applications?

Gordon McMillan gmcm at
Sun May 20 22:07:36 EDT 2001

hungjunglu at wrote in <mailman.990048145.9953.python-
list at>:

>I have asked Mark Hammond, but no clear answers, yet. (He told me to 
>look into regsvr32.)
>I am also starting to look at all installation aspects of Python COM. 
>(registry items, DLLs, etc.) If I succeed, I'll let people know.
>So far I have succeeded in distributing Python COM client 
>It's the Python COM server part that is complicated. I know py2exe or 
>Gordon installer are not enough, but besides that, more registry 
>tweaking and DLL handling are needed.

Actually, it's more a problem with the arrangement of responsibilities.

Your typical Python COM server defines a class and has some register / 
unregister logic under the "if __name__ == '__main__':" code. So it's both 
a script (when registering / unregistering) and a module (when attached 
through COM). If you just freeze your class, all you'll get is the register 
/ unregister code, and it won't create the right entries.

There *is* a script which runs (when you use out-of-process): it's 
win32com/server/ As proof of concept, I hacked up so that I got localserver.exe which could serve up my COM 
class. By manually tweaking the registry, I got it working (out-of-
process). So I know this stuff is possible, it's just that generalizing and 
automating it is a considerable amount of work.

[And I'm not sure that in-process is possible, mainly because with in-
process I don't think I have enough control over installation and search 

- Gordon

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